merge in hp300 support from Utah
[unix-history] / usr / src / sys / hp300 / stand / nhpib.c
/*
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
* @(#)nhpib.c 7.1 (Berkeley) %G%
*/
/*
* Internal/98624 HPIB driver
*/
#include "param.h"
#include "../hpdev/nhpibreg.h"
#include "hpibvar.h"
nhpibinit(unit)
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd = (struct nhpibdevice *)hs->sc_addr;
extern int internalhpib;
if ((int)hd == internalhpib) {
hs->sc_type = HPIBA;
hs->sc_ba = HPIBA_BA;
}
else if (hd->hpib_cid == HPIBB) {
hs->sc_type = HPIBB;
hs->sc_ba = hd->hpib_csa & CSA_BA;
}
else
return(0);
nhpibreset(unit);
return(1);
}
nhpibreset(unit)
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
hd = (struct nhpibdevice *)hs->sc_addr;
hd->hpib_acr = AUX_SSWRST;
hd->hpib_ar = hs->sc_ba;
hd->hpib_lim = 0;
hd->hpib_mim = 0;
hd->hpib_acr = AUX_CDAI;
hd->hpib_acr = AUX_CSHDW;
hd->hpib_acr = AUX_SSTD1;
hd->hpib_acr = AUX_SVSTD1;
hd->hpib_acr = AUX_CPP;
hd->hpib_acr = AUX_CHDFA;
hd->hpib_acr = AUX_CHDFE;
hd->hpib_acr = AUX_RHDF;
hd->hpib_acr = AUX_CSWRST;
hd->hpib_acr = AUX_TCA;
hd->hpib_acr = AUX_CSRE;
hd->hpib_acr = AUX_SSIC;
DELAY(100);
hd->hpib_acr = AUX_CSIC;
hd->hpib_acr = AUX_SSRE;
hd->hpib_data = C_DCL;
DELAY(100000);
}
nhpibsend(unit, slave, sec, buf, cnt)
register char *buf;
register int cnt;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int origcnt = cnt;
hd = (struct nhpibdevice *)hs->sc_addr;
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL;
nhpibowait(hd);
hd->hpib_data = C_TAG + hs->sc_ba;
hd->hpib_acr = AUX_STON;
nhpibowait(hd);
hd->hpib_data = C_LAG + slave;
nhpibowait(hd);
if (sec != -1) {
hd->hpib_data = C_SCG + sec;
nhpibowait(hd);
}
hd->hpib_acr = AUX_GTS;
if (cnt) {
while (--cnt) {
hd->hpib_data = *buf++;
if (nhpibowait(hd) < 0)
break;
}
hd->hpib_acr = AUX_EOI;
hd->hpib_data = *buf;
if (nhpibowait(hd) < 0)
cnt++;
hd->hpib_acr = AUX_TCA;
}
return(origcnt - cnt);
}
nhpibrecv(unit, slave, sec, buf, cnt)
register char *buf;
register int cnt;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int origcnt = cnt;
hd = (struct nhpibdevice *)hs->sc_addr;
hd->hpib_acr = AUX_TCA;
hd->hpib_data = C_UNL;
nhpibowait(hd);
hd->hpib_data = C_LAG + hs->sc_ba;
hd->hpib_acr = AUX_SLON;
nhpibowait(hd);
hd->hpib_data = C_TAG + slave;
nhpibowait(hd);
if (sec != -1) {
hd->hpib_data = C_SCG + sec;
nhpibowait(hd);
}
hd->hpib_acr = AUX_RHDF;
hd->hpib_acr = AUX_GTS;
if (cnt) {
while (--cnt >= 0) {
if (nhpibiwait(hd) < 0)
break;
*buf++ = hd->hpib_data;
}
cnt++;
hd->hpib_acr = AUX_TCA;
}
return(origcnt - cnt);
}
nhpibppoll(unit)
register int unit;
{
register struct hpib_softc *hs = &hpib_softc[unit];
register struct nhpibdevice *hd;
register int ppoll;
hd = (struct nhpibdevice *)hs->sc_addr;
hd->hpib_acr = AUX_SPP;
DELAY(25);
ppoll = hd->hpib_cpt;
hd->hpib_acr = AUX_CPP;
return(ppoll);
}
nhpibowait(hd)
register struct nhpibdevice *hd;
{
register int timo = 100000;
while ((hd->hpib_mis & MIS_BO) == 0 && --timo)
;
if (timo == 0)
return(-1);
return(0);
}
nhpibiwait(hd)
register struct nhpibdevice *hd;
{
register int timo = 100000;
while ((hd->hpib_mis & MIS_BI) == 0 && --timo)
;
if (timo == 0)
return(-1);
return(0);
}